How is black body radiation calculated?

Open in App

Solution

Black body is an idealized physical body irrespective of frequency or angle of incidence that can absorb all incident electromagnetic radiation. By using Stefan Boltzmann equation total power of black body radiation is evaluated as :
$\frac{P}{A} = σ T^{4} j / m^{2} s$
where, $P$ is radiating power
$A$ is radiating area
$σ$ is Stefan's constant $= 5.6703 \times 10^{- 8} w a t t / m^{2} K^{4}$ \
$T$ is the temperature of the radiator

Suggest Corrections

Similar questions

Assume that the total surface area of a human body is 1.6 $m^{2}$ and that it radiates like an ideal radiator. Calculate the amount of enrgy radiated per second by the body if the body temperature is $37^{0}$ C. Stefan constant $σ$ is $6.0 \times 10^{- 8} W m^{- 2} K^{- 4}$ .

Q. The intensity of sun on earth is

1400 W / m^{2}

. Assuming earth to be a black body. Calculate radiation pressure?

How do you calculate the radiation constant?

Q. Black body radiation is

How radiation of heat occurs from our body?

Join BYJU'S Learning Program